Link: How to Clear Spotify Cache

If you have been a regular user of Spotify (on desktop), you should know that it caches your playlist in the local hard disk so it can quickly playback the songs without having to stream from their server again. However, if you are running low on hard disk space, you might want to clear the cache to make way for more important documents. The Spotify desktop client doesn’t come with a way to clear the cache. Here is how you can clear Spotify cache in Windows, Mac and Linux.